Peridot is a transparent green gemstone that is the gem-quality variety of the mineral olivine. Its color ranges from yellowish green to deep olive green due to the presence of iron. Here are some key facts: * Chemical composition: Magnesium iron silicate (Mg,Fe)₂SiO₄ * Color: Yellow-green, olive green, to brownish green * Hardness: 6.5–7 on the Mohs hardness scale * Crystal system: Orthorhombic * Luster: Vitreous (glass-like) * Birthstone: August Peridot is popular in rings, pendants, earrings, and other jewelry because of its bright green color and good transparency. It should be protected from hard impacts and abrasive wear, as it is softer than gemstones like sapphire or diamond.